// Copyright 2021 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

syntax = "proto3";

package google.cloud.kms.v1;

import "google/api/field_behavior.proto";
import "google/api/resource.proto";
import "google/protobuf/duration.proto";
import "google/protobuf/timestamp.proto";
import "google/protobuf/wrappers.proto";
import "google/api/annotations.proto";

option cc_enable_arenas = true;
option csharp_namespace = "Google.Cloud.Kms.V1";
option go_package = "google.golang.org/genproto/googleapis/cloud/kms/v1;kms";
option java_multiple_files = true;
option java_outer_classname = "KmsResourcesProto";
option java_package = "com.google.cloud.kms.v1";
option php_namespace = "Google\\Cloud\\Kms\\V1";

// A [KeyRing][google.cloud.kms.v1.KeyRing] is a toplevel logical grouping of [CryptoKeys][google.cloud.kms.v1.CryptoKey].
message KeyRing {
  option (google.api.resource) = {
    type: "cloudkms.googleapis.com/KeyRing"
    pattern: "projects/{project}/locations/{location}/keyRings/{key_ring}"
  };

  // Output only. The resource name for the [KeyRing][google.cloud.kms.v1.KeyRing] in the format
  // `projects/*/locations/*/keyRings/*`.
  string name = 1 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. The time at which this [KeyRing][google.cloud.kms.v1.KeyRing] was created.
  google.protobuf.Timestamp create_time = 2 [(google.api.field_behavior) = OUTPUT_ONLY];
}

// A [CryptoKey][google.cloud.kms.v1.CryptoKey] represents a logical key that can be used for cryptographic
// operations.
//
// A [CryptoKey][google.cloud.kms.v1.CryptoKey] is made up of zero or more [versions][google.cloud.kms.v1.CryptoKeyVersion],
// which represent the actual key material used in cryptographic operations.
message CryptoKey {
  option (google.api.resource) = {
    type: "cloudkms.googleapis.com/CryptoKey"
    pattern: "projects/{project}/locations/{location}/keyRings/{key_ring}/cryptoKeys/{crypto_key}"
  };

  // [CryptoKeyPurpose][google.cloud.kms.v1.CryptoKey.CryptoKeyPurpose] describes the cryptographic capabilities of a
  // [CryptoKey][google.cloud.kms.v1.CryptoKey]. A given key can only be used for the operations allowed by
  // its purpose. For more information, see
  // [Key purposes](https://cloud.google.com/kms/docs/algorithms#key_purposes).
  enum CryptoKeyPurpose {
    // Not specified.
    CRYPTO_KEY_PURPOSE_UNSPECIFIED = 0;

    // [CryptoKeys][google.cloud.kms.v1.CryptoKey] with this purpose may be used with
    // [Encrypt][google.cloud.kms.v1.KeyManagementService.Encrypt] and
    // [Decrypt][google.cloud.kms.v1.KeyManagementService.Decrypt].
    ENCRYPT_DECRYPT = 1;

    // [CryptoKeys][google.cloud.kms.v1.CryptoKey] with this purpose may be used with
    // [AsymmetricSign][google.cloud.kms.v1.KeyManagementService.AsymmetricSign] and
    // [GetPublicKey][google.cloud.kms.v1.KeyManagementService.GetPublicKey].
    ASYMMETRIC_SIGN = 5;

    // [CryptoKeys][google.cloud.kms.v1.CryptoKey] with this purpose may be used with
    // [AsymmetricDecrypt][google.cloud.kms.v1.KeyManagementService.AsymmetricDecrypt] and
    // [GetPublicKey][google.cloud.kms.v1.KeyManagementService.GetPublicKey].
    ASYMMETRIC_DECRYPT = 6;

    // [CryptoKeys][google.cloud.kms.v1.CryptoKey] with this purpose may be used with
    // [MacSign][google.cloud.kms.v1.KeyManagementService.MacSign].
    MAC = 9;
  }

  // Output only. The resource name for this [CryptoKey][google.cloud.kms.v1.CryptoKey] in the format
  // `projects/*/locations/*/keyRings/*/cryptoKeys/*`.
  string name = 1 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. A copy of the "primary" [CryptoKeyVersion][google.cloud.kms.v1.CryptoKeyVersion] that will be used
  // by [Encrypt][google.cloud.kms.v1.KeyManagementService.Encrypt] when this [CryptoKey][google.cloud.kms.v1.CryptoKey] is given
  // in [EncryptRequest.name][google.cloud.kms.v1.EncryptRequest.name].
  //
  // The [CryptoKey][google.cloud.kms.v1.CryptoKey]'s primary version can be updated via
  // [UpdateCryptoKeyPrimaryVersion][google.cloud.kms.v1.KeyManagementService.UpdateCryptoKeyPrimaryVersion].
  //
  // Keys with [purpose][google.cloud.kms.v1.CryptoKey.purpose]
  // [ENCRYPT_DECRYPT][google.cloud.kms.v1.CryptoKey.CryptoKeyPurpose.ENCRYPT_DECRYPT] may have a
  // primary. For other keys, this field will be omitted.
  CryptoKeyVersion primary = 2 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Immutable. The immutable purpose of this [CryptoKey][google.cloud.kms.v1.CryptoKey].
  CryptoKeyPurpose purpose = 3 [(google.api.field_behavior) = IMMUTABLE];

  // Output only. The time at which this [CryptoKey][google.cloud.kms.v1.CryptoKey] was created.
  google.protobuf.Timestamp create_time = 5 [(google.api.field_behavior) = OUTPUT_ONLY];

  // At [next_rotation_time][google.cloud.kms.v1.CryptoKey.next_rotation_time], the Key Management Service will automatically:
  //
  // 1. Create a new version of this [CryptoKey][google.cloud.kms.v1.CryptoKey].
  // 2. Mark the new version as primary.
  //
  // Key rotations performed manually via
  // [CreateCryptoKeyVersion][google.cloud.kms.v1.KeyManagementService.CreateCryptoKeyVersion] and
  // [UpdateCryptoKeyPrimaryVersion][google.cloud.kms.v1.KeyManagementService.UpdateCryptoKeyPrimaryVersion]
  // do not affect [next_rotation_time][google.cloud.kms.v1.CryptoKey.next_rotation_time].
  //
  // Keys with [purpose][google.cloud.kms.v1.CryptoKey.purpose]
  // [ENCRYPT_DECRYPT][google.cloud.kms.v1.CryptoKey.CryptoKeyPurpose.ENCRYPT_DECRYPT] support
  // automatic rotation. For other keys, this field must be omitted.
  google.protobuf.Timestamp next_rotation_time = 7;

  // Controls the rate of automatic rotation.
  oneof rotation_schedule {
    // [next_rotation_time][google.cloud.kms.v1.CryptoKey.next_rotation_time] will be advanced by this period when the service
    // automatically rotates a key. Must be at least 24 hours and at most
    // 876,000 hours.
    //
    // If [rotation_period][google.cloud.kms.v1.CryptoKey.rotation_period] is set, [next_rotation_time][google.cloud.kms.v1.CryptoKey.next_rotation_time] must also be set.
    //
    // Keys with [purpose][google.cloud.kms.v1.CryptoKey.purpose]
    // [ENCRYPT_DECRYPT][google.cloud.kms.v1.CryptoKey.CryptoKeyPurpose.ENCRYPT_DECRYPT] support
    // automatic rotation. For other keys, this field must be omitted.
    google.protobuf.Duration rotation_period = 8;
  }

  // A template describing settings for new [CryptoKeyVersion][google.cloud.kms.v1.CryptoKeyVersion] instances.
  // The properties of new [CryptoKeyVersion][google.cloud.kms.v1.CryptoKeyVersion] instances created by either
  // [CreateCryptoKeyVersion][google.cloud.kms.v1.KeyManagementService.CreateCryptoKeyVersion] or
  // auto-rotation are controlled by this template.
  CryptoKeyVersionTemplate version_template = 11;

  // Labels with user-defined metadata. For more information, see
  // [Labeling Keys](https://cloud.google.com/kms/docs/labeling-keys).
  map<string, string> labels = 10;

  // Immutable. Whether this key may contain imported versions only.
  bool import_only = 13 [(google.api.field_behavior) = IMMUTABLE];

  // Immutable. The period of time that versions of this key spend in the
  // [DESTROY_SCHEDULED][google.cloud.kms.v1.CryptoKeyVersion.CryptoKeyVersionState.DESTROY_SCHEDULED]
  // state before transitioning to
  // [DESTROYED][google.cloud.kms.v1.CryptoKeyVersion.CryptoKeyVersionState.DESTROYED]. If not
  // specified at creation time, the default duration is 24 hours.
  google.protobuf.Duration destroy_scheduled_duration = 14 [(google.api.field_behavior) = IMMUTABLE];
}

// A [CryptoKeyVersionTemplate][google.cloud.kms.v1.CryptoKeyVersionTemplate] specifies the properties to use when creating
// a new [CryptoKeyVersion][google.cloud.kms.v1.CryptoKeyVersion], either manually with
// [CreateCryptoKeyVersion][google.cloud.kms.v1.KeyManagementService.CreateCryptoKeyVersion] or
// automatically as a result of auto-rotation.
message CryptoKeyVersionTemplate {
  // [ProtectionLevel][google.cloud.kms.v1.ProtectionLevel] to use when creating a [CryptoKeyVersion][google.cloud.kms.v1.CryptoKeyVersion] based on
  // this template. Immutable. Defaults to [SOFTWARE][google.cloud.kms.v1.ProtectionLevel.SOFTWARE].
  ProtectionLevel protection_level = 1;

  // Required. [Algorithm][google.cloud.kms.v1.CryptoKeyVersion.CryptoKeyVersionAlgorithm] to use
  // when creating a [CryptoKeyVersion][google.cloud.kms.v1.CryptoKeyVersion] based on this template.
  //
  // For backwards compatibility, GOOGLE_SYMMETRIC_ENCRYPTION is implied if both
  // this field is omitted and [CryptoKey.purpose][google.cloud.kms.v1.CryptoKey.purpose] is
  // [ENCRYPT_DECRYPT][google.cloud.kms.v1.CryptoKey.CryptoKeyPurpose.ENCRYPT_DECRYPT].
  CryptoKeyVersion.CryptoKeyVersionAlgorithm algorithm = 3 [(google.api.field_behavior) = REQUIRED];
}

// Contains an HSM-generated attestation about a key operation. For more
// information, see [Verifying attestations]
// (https://cloud.google.com/kms/docs/attest-key).
message KeyOperationAttestation {
  // Attestation formats provided by the HSM.
  enum AttestationFormat {
    // Not specified.
    ATTESTATION_FORMAT_UNSPECIFIED = 0;

    // Cavium HSM attestation compressed with gzip. Note that this format is
    // defined by Cavium and subject to change at any time.
    CAVIUM_V1_COMPRESSED = 3;

    // Cavium HSM attestation V2 compressed with gzip. This is a new format
    // introduced in Cavium's version 3.2-08.
    CAVIUM_V2_COMPRESSED = 4;
  }

  // Output only. The format of the attestation data.
  AttestationFormat format = 4 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. The attestation data provided by the HSM when the key
  // operation was performed.
  bytes content = 5 [(google.api.field_behavior) = OUTPUT_ONLY];
}

// A [CryptoKeyVersion][google.cloud.kms.v1.CryptoKeyVersion] represents an individual cryptographic key, and the
// associated key material.
//
// An [ENABLED][google.cloud.kms.v1.CryptoKeyVersion.CryptoKeyVersionState.ENABLED] version can be
// used for cryptographic operations.
//
// For security reasons, the raw cryptographic key material represented by a
// [CryptoKeyVersion][google.cloud.kms.v1.CryptoKeyVersion] can never be viewed or exported. It can only be used to
// encrypt, decrypt, or sign data when an authorized user or application invokes
// Cloud KMS.
message CryptoKeyVersion {
  option (google.api.resource) = {
    type: "cloudkms.googleapis.com/CryptoKeyVersion"
    pattern: "projects/{project}/locations/{location}/keyRings/{key_ring}/cryptoKeys/{crypto_key}/cryptoKeyVersions/{crypto_key_version}"
  };

  // The algorithm of the [CryptoKeyVersion][google.cloud.kms.v1.CryptoKeyVersion], indicating what
  // parameters must be used for each cryptographic operation.
  //
  // The
  // [GOOGLE_SYMMETRIC_ENCRYPTION][google.cloud.kms.v1.CryptoKeyVersion.CryptoKeyVersionAlgorithm.GOOGLE_SYMMETRIC_ENCRYPTION]
  // algorithm is usable with [CryptoKey.purpose][google.cloud.kms.v1.CryptoKey.purpose]
  // [ENCRYPT_DECRYPT][google.cloud.kms.v1.CryptoKey.CryptoKeyPurpose.ENCRYPT_DECRYPT].
  //
  // Algorithms beginning with "RSA_SIGN_" are usable with [CryptoKey.purpose][google.cloud.kms.v1.CryptoKey.purpose]
  // [ASYMMETRIC_SIGN][google.cloud.kms.v1.CryptoKey.CryptoKeyPurpose.ASYMMETRIC_SIGN].
  //
  // The fields in the name after "RSA_SIGN_" correspond to the following
  // parameters: padding algorithm, modulus bit length, and digest algorithm.
  //
  // For PSS, the salt length used is equal to the length of digest
  // algorithm. For example,
  // [RSA_SIGN_PSS_2048_SHA256][google.cloud.kms.v1.CryptoKeyVersion.CryptoKeyVersionAlgorithm.RSA_SIGN_PSS_2048_SHA256]
  // will use PSS with a salt length of 256 bits or 32 bytes.
  //
  // Algorithms beginning with "RSA_DECRYPT_" are usable with
  // [CryptoKey.purpose][google.cloud.kms.v1.CryptoKey.purpose]
  // [ASYMMETRIC_DECRYPT][google.cloud.kms.v1.CryptoKey.CryptoKeyPurpose.ASYMMETRIC_DECRYPT].
  //
  // The fields in the name after "RSA_DECRYPT_" correspond to the following
  // parameters: padding algorithm, modulus bit length, and digest algorithm.
  //
  // Algorithms beginning with "EC_SIGN_" are usable with [CryptoKey.purpose][google.cloud.kms.v1.CryptoKey.purpose]
  // [ASYMMETRIC_SIGN][google.cloud.kms.v1.CryptoKey.CryptoKeyPurpose.ASYMMETRIC_SIGN].
  //
  // The fields in the name after "EC_SIGN_" correspond to the following
  // parameters: elliptic curve, digest algorithm.
  //
  // Algorithms beginning with "HMAC_" are usable with [CryptoKey.purpose][google.cloud.kms.v1.CryptoKey.purpose]
  // [MAC][google.cloud.kms.v1.CryptoKey.CryptoKeyPurpose.MAC].
  //
  // The suffix following "HMAC_" corresponds to the hash algorithm being used
  // (eg. SHA256).
  //
  // For more information, see [Key purposes and algorithms]
  // (https://cloud.google.com/kms/docs/algorithms).
  enum CryptoKeyVersionAlgorithm {
    // Not specified.
    CRYPTO_KEY_VERSION_ALGORITHM_UNSPECIFIED = 0;

    // Creates symmetric encryption keys.
    GOOGLE_SYMMETRIC_ENCRYPTION = 1;

    // RSASSA-PSS 2048 bit key with a SHA256 digest.
    RSA_SIGN_PSS_2048_SHA256 = 2;

    // RSASSA-PSS 3072 bit key with a SHA256 digest.
    RSA_SIGN_PSS_3072_SHA256 = 3;

    // RSASSA-PSS 4096 bit key with a SHA256 digest.
    RSA_SIGN_PSS_4096_SHA256 = 4;

    // RSASSA-PSS 4096 bit key with a SHA512 digest.
    RSA_SIGN_PSS_4096_SHA512 = 15;

    // RSASSA-PKCS1-v1_5 with a 2048 bit key and a SHA256 digest.
    RSA_SIGN_PKCS1_2048_SHA256 = 5;

    // RSASSA-PKCS1-v1_5 with a 3072 bit key and a SHA256 digest.
    RSA_SIGN_PKCS1_3072_SHA256 = 6;

    // RSASSA-PKCS1-v1_5 with a 4096 bit key and a SHA256 digest.
    RSA_SIGN_PKCS1_4096_SHA256 = 7;

    // RSASSA-PKCS1-v1_5 with a 4096 bit key and a SHA512 digest.
    RSA_SIGN_PKCS1_4096_SHA512 = 16;

    // RSAES-OAEP 2048 bit key with a SHA256 digest.
    RSA_DECRYPT_OAEP_2048_SHA256 = 8;

    // RSAES-OAEP 3072 bit key with a SHA256 digest.
    RSA_DECRYPT_OAEP_3072_SHA256 = 9;

    // RSAES-OAEP 4096 bit key with a SHA256 digest.
    RSA_DECRYPT_OAEP_4096_SHA256 = 10;

    // RSAES-OAEP 4096 bit key with a SHA512 digest.
    RSA_DECRYPT_OAEP_4096_SHA512 = 17;

    // ECDSA on the NIST P-256 curve with a SHA256 digest.
    EC_SIGN_P256_SHA256 = 12;

    // ECDSA on the NIST P-384 curve with a SHA384 digest.
    EC_SIGN_P384_SHA384 = 13;

    // ECDSA on the non-NIST secp256k1 curve. This curve is only supported for
    // HSM protection level.
    EC_SIGN_SECP256K1_SHA256 = 31;

    // HMAC-SHA256 signing with a 256 bit key.
    HMAC_SHA256 = 32;

    // Algorithm representing symmetric encryption by an external key manager.
    EXTERNAL_SYMMETRIC_ENCRYPTION = 18;
  }

  // The state of a [CryptoKeyVersion][google.cloud.kms.v1.CryptoKeyVersion], indicating if it can be used.
  enum CryptoKeyVersionState {
    // Not specified.
    CRYPTO_KEY_VERSION_STATE_UNSPECIFIED = 0;

    // This version is still being generated. It may not be used, enabled,
    // disabled, or destroyed yet. Cloud KMS will automatically mark this
    // version [ENABLED][google.cloud.kms.v1.CryptoKeyVersion.CryptoKeyVersionState.ENABLED] as soon as the version is ready.
    PENDING_GENERATION = 5;

    // This version may be used for cryptographic operations.
    ENABLED = 1;

    // This version may not be used, but the key material is still available,
    // and the version can be placed back into the [ENABLED][google.cloud.kms.v1.CryptoKeyVersion.CryptoKeyVersionState.ENABLED] state.
    DISABLED = 2;

    // This version is destroyed, and the key material is no longer stored.
    // This version may only become [ENABLED][google.cloud.kms.v1.CryptoKeyVersion.CryptoKeyVersionState.ENABLED] again if this version is
    // [reimport_eligible][google.cloud.kms.v1.CryptoKeyVersion.reimport_eligible] and the original
    // key material is reimported with a call to
    // [KeyManagementService.ImportCryptoKeyVersion][google.cloud.kms.v1.KeyManagementService.ImportCryptoKeyVersion].
    DESTROYED = 3;

    // This version is scheduled for destruction, and will be destroyed soon.
    // Call
    // [RestoreCryptoKeyVersion][google.cloud.kms.v1.KeyManagementService.RestoreCryptoKeyVersion]
    // to put it back into the [DISABLED][google.cloud.kms.v1.CryptoKeyVersion.CryptoKeyVersionState.DISABLED] state.
    DESTROY_SCHEDULED = 4;

    // This version is still being imported. It may not be used, enabled,
    // disabled, or destroyed yet. Cloud KMS will automatically mark this
    // version [ENABLED][google.cloud.kms.v1.CryptoKeyVersion.CryptoKeyVersionState.ENABLED] as soon as the version is ready.
    PENDING_IMPORT = 6;

    // This version was not imported successfully. It may not be used, enabled,
    // disabled, or destroyed. The submitted key material has been discarded.
    // Additional details can be found in
    // [CryptoKeyVersion.import_failure_reason][google.cloud.kms.v1.CryptoKeyVersion.import_failure_reason].
    IMPORT_FAILED = 7;
  }

  // A view for [CryptoKeyVersion][google.cloud.kms.v1.CryptoKeyVersion]s. Controls the level of detail returned
  // for [CryptoKeyVersions][google.cloud.kms.v1.CryptoKeyVersion] in
  // [KeyManagementService.ListCryptoKeyVersions][google.cloud.kms.v1.KeyManagementService.ListCryptoKeyVersions] and
  // [KeyManagementService.ListCryptoKeys][google.cloud.kms.v1.KeyManagementService.ListCryptoKeys].
  enum CryptoKeyVersionView {
    // Default view for each [CryptoKeyVersion][google.cloud.kms.v1.CryptoKeyVersion]. Does not include
    // the [attestation][google.cloud.kms.v1.CryptoKeyVersion.attestation] field.
    CRYPTO_KEY_VERSION_VIEW_UNSPECIFIED = 0;

    // Provides all fields in each [CryptoKeyVersion][google.cloud.kms.v1.CryptoKeyVersion], including the
    // [attestation][google.cloud.kms.v1.CryptoKeyVersion.attestation].
    FULL = 1;
  }

  // Output only. The resource name for this [CryptoKeyVersion][google.cloud.kms.v1.CryptoKeyVersion] in the format
  // `projects/*/locations/*/keyRings/*/cryptoKeys/*/cryptoKeyVersions/*`.
  string name = 1 [(google.api.field_behavior) = OUTPUT_ONLY];

  // The current state of the [CryptoKeyVersion][google.cloud.kms.v1.CryptoKeyVersion].
  CryptoKeyVersionState state = 3;

  // Output only. The [ProtectionLevel][google.cloud.kms.v1.ProtectionLevel] describing how crypto operations are
  // performed with this [CryptoKeyVersion][google.cloud.kms.v1.CryptoKeyVersion].
  ProtectionLevel protection_level = 7 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. The [CryptoKeyVersionAlgorithm][google.cloud.kms.v1.CryptoKeyVersion.CryptoKeyVersionAlgorithm] that this
  // [CryptoKeyVersion][google.cloud.kms.v1.CryptoKeyVersion] supports.
  CryptoKeyVersionAlgorithm algorithm = 10 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. Statement that was generated and signed by the HSM at key
  // creation time. Use this statement to verify attributes of the key as stored
  // on the HSM, independently of Google. Only provided for key versions with
  // [protection_level][google.cloud.kms.v1.CryptoKeyVersion.protection_level] [HSM][google.cloud.kms.v1.ProtectionLevel.HSM].
  KeyOperationAttestation attestation = 8 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. The time at which this [CryptoKeyVersion][google.cloud.kms.v1.CryptoKeyVersion] was created.
  google.protobuf.Timestamp create_time = 4 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. The time this [CryptoKeyVersion][google.cloud.kms.v1.CryptoKeyVersion]'s key material was
  // generated.
  google.protobuf.Timestamp generate_time = 11 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. The time this [CryptoKeyVersion][google.cloud.kms.v1.CryptoKeyVersion]'s key material is scheduled
  // for destruction. Only present if [state][google.cloud.kms.v1.CryptoKeyVersion.state] is
  // [DESTROY_SCHEDULED][google.cloud.kms.v1.CryptoKeyVersion.CryptoKeyVersionState.DESTROY_SCHEDULED].
  google.protobuf.Timestamp destroy_time = 5 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. The time this CryptoKeyVersion's key material was
  // destroyed. Only present if [state][google.cloud.kms.v1.CryptoKeyVersion.state] is
  // [DESTROYED][google.cloud.kms.v1.CryptoKeyVersion.CryptoKeyVersionState.DESTROYED].
  google.protobuf.Timestamp destroy_event_time = 6 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. The name of the [ImportJob][google.cloud.kms.v1.ImportJob] used in the most recent import of this
  // [CryptoKeyVersion][google.cloud.kms.v1.CryptoKeyVersion]. Only present if the underlying key material was
  // imported.
  string import_job = 14 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. The time at which this [CryptoKeyVersion][google.cloud.kms.v1.CryptoKeyVersion]'s key material
  // was most recently imported.
  google.protobuf.Timestamp import_time = 15 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. The root cause of the most recent import failure. Only present if
  // [state][google.cloud.kms.v1.CryptoKeyVersion.state] is
  // [IMPORT_FAILED][google.cloud.kms.v1.CryptoKeyVersion.CryptoKeyVersionState.IMPORT_FAILED].
  string import_failure_reason = 16 [(google.api.field_behavior) = OUTPUT_ONLY];

  // ExternalProtectionLevelOptions stores a group of additional fields for
  // configuring a [CryptoKeyVersion][google.cloud.kms.v1.CryptoKeyVersion] that are specific to the
  // [EXTERNAL][google.cloud.kms.v1.ProtectionLevel.EXTERNAL] protection level.
  ExternalProtectionLevelOptions external_protection_level_options = 17;

  // Output only. Whether or not this key version is eligible for reimport, by being
  // specified as a target in
  // [ImportCryptoKeyVersionRequest.crypto_key_version][google.cloud.kms.v1.ImportCryptoKeyVersionRequest.crypto_key_version].
  bool reimport_eligible = 18 [(google.api.field_behavior) = OUTPUT_ONLY];
}

// The public key for a given [CryptoKeyVersion][google.cloud.kms.v1.CryptoKeyVersion]. Obtained via
// [GetPublicKey][google.cloud.kms.v1.KeyManagementService.GetPublicKey].
message PublicKey {
  option (google.api.resource) = {
    type: "cloudkms.googleapis.com/PublicKey"
    pattern: "projects/{project}/locations/{location}/keyRings/{key_ring}/cryptoKeys/{crypto_key}/cryptoKeyVersions/{crypto_key_version}/publicKey"
  };

  // The public key, encoded in PEM format. For more information, see the
  // [RFC 7468](https://tools.ietf.org/html/rfc7468) sections for
  // [General Considerations](https://tools.ietf.org/html/rfc7468#section-2) and
  // [Textual Encoding of Subject Public Key Info]
  // (https://tools.ietf.org/html/rfc7468#section-13).
  string pem = 1;

  // The [Algorithm][google.cloud.kms.v1.CryptoKeyVersion.CryptoKeyVersionAlgorithm] associated
  // with this key.
  CryptoKeyVersion.CryptoKeyVersionAlgorithm algorithm = 2;

  // Integrity verification field. A CRC32C checksum of the returned
  // [PublicKey.pem][google.cloud.kms.v1.PublicKey.pem]. An integrity check of [PublicKey.pem][google.cloud.kms.v1.PublicKey.pem] can be performed
  // by computing the CRC32C checksum of [PublicKey.pem][google.cloud.kms.v1.PublicKey.pem] and
  // comparing your results to this field. Discard the response in case of
  // non-matching checksum values, and perform a limited number of retries. A
  // persistent mismatch may indicate an issue in your computation of the CRC32C
  // checksum.
  // Note: This field is defined as int64 for reasons of compatibility across
  // different languages. However, it is a non-negative integer, which will
  // never exceed 2^32-1, and can be safely downconverted to uint32 in languages
  // that support this type.
  //
  // NOTE: This field is in Beta.
  google.protobuf.Int64Value pem_crc32c = 3;

  // The [name][google.cloud.kms.v1.CryptoKeyVersion.name] of the [CryptoKeyVersion][google.cloud.kms.v1.CryptoKeyVersion] public key.
  // Provided here for verification.
  //
  // NOTE: This field is in Beta.
  string name = 4;

  // The [ProtectionLevel][google.cloud.kms.v1.ProtectionLevel] of the [CryptoKeyVersion][google.cloud.kms.v1.CryptoKeyVersion] public key.
  ProtectionLevel protection_level = 5;
}

// An [ImportJob][google.cloud.kms.v1.ImportJob] can be used to create [CryptoKeys][google.cloud.kms.v1.CryptoKey] and
// [CryptoKeyVersions][google.cloud.kms.v1.CryptoKeyVersion] using pre-existing key material,
// generated outside of Cloud KMS.
//
// When an [ImportJob][google.cloud.kms.v1.ImportJob] is created, Cloud KMS will generate a "wrapping key",
// which is a public/private key pair. You use the wrapping key to encrypt (also
// known as wrap) the pre-existing key material to protect it during the import
// process. The nature of the wrapping key depends on the choice of
// [import_method][google.cloud.kms.v1.ImportJob.import_method]. When the wrapping key generation
// is complete, the [state][google.cloud.kms.v1.ImportJob.state] will be set to
// [ACTIVE][google.cloud.kms.v1.ImportJob.ImportJobState.ACTIVE] and the [public_key][google.cloud.kms.v1.ImportJob.public_key]
// can be fetched. The fetched public key can then be used to wrap your
// pre-existing key material.
//
// Once the key material is wrapped, it can be imported into a new
// [CryptoKeyVersion][google.cloud.kms.v1.CryptoKeyVersion] in an existing [CryptoKey][google.cloud.kms.v1.CryptoKey] by calling
// [ImportCryptoKeyVersion][google.cloud.kms.v1.KeyManagementService.ImportCryptoKeyVersion].
// Multiple [CryptoKeyVersions][google.cloud.kms.v1.CryptoKeyVersion] can be imported with a single
// [ImportJob][google.cloud.kms.v1.ImportJob]. Cloud KMS uses the private key portion of the wrapping key to
// unwrap the key material. Only Cloud KMS has access to the private key.
//
// An [ImportJob][google.cloud.kms.v1.ImportJob] expires 3 days after it is created. Once expired, Cloud KMS
// will no longer be able to import or unwrap any key material that was wrapped
// with the [ImportJob][google.cloud.kms.v1.ImportJob]'s public key.
//
// For more information, see
// [Importing a key](https://cloud.google.com/kms/docs/importing-a-key).
message ImportJob {
  option (google.api.resource) = {
    type: "cloudkms.googleapis.com/ImportJob"
    pattern: "projects/{project}/locations/{location}/keyRings/{key_ring}/importJobs/{import_job}"
  };

  // The public key component of the wrapping key. For details of the type of
  // key this public key corresponds to, see the [ImportMethod][google.cloud.kms.v1.ImportJob.ImportMethod].
  message WrappingPublicKey {
    // The public key, encoded in PEM format. For more information, see the [RFC
    // 7468](https://tools.ietf.org/html/rfc7468) sections for [General
    // Considerations](https://tools.ietf.org/html/rfc7468#section-2) and
    // [Textual Encoding of Subject Public Key Info]
    // (https://tools.ietf.org/html/rfc7468#section-13).
    string pem = 1;
  }

  // [ImportMethod][google.cloud.kms.v1.ImportJob.ImportMethod] describes the key wrapping method chosen for this
  // [ImportJob][google.cloud.kms.v1.ImportJob].
  enum ImportMethod {
    // Not specified.
    IMPORT_METHOD_UNSPECIFIED = 0;

    // This ImportMethod represents the CKM_RSA_AES_KEY_WRAP key wrapping
    // scheme defined in the PKCS #11 standard. In summary, this involves
    // wrapping the raw key with an ephemeral AES key, and wrapping the
    // ephemeral AES key with a 3072 bit RSA key. For more details, see
    // [RSA AES key wrap
    // mechanism](http://docs.oasis-open.org/pkcs11/pkcs11-curr/v2.40/cos01/pkcs11-curr-v2.40-cos01.html#_Toc408226908).
    RSA_OAEP_3072_SHA1_AES_256 = 1;

    // This ImportMethod represents the CKM_RSA_AES_KEY_WRAP key wrapping
    // scheme defined in the PKCS #11 standard. In summary, this involves
    // wrapping the raw key with an ephemeral AES key, and wrapping the
    // ephemeral AES key with a 4096 bit RSA key. For more details, see
    // [RSA AES key wrap
    // mechanism](http://docs.oasis-open.org/pkcs11/pkcs11-curr/v2.40/cos01/pkcs11-curr-v2.40-cos01.html#_Toc408226908).
    RSA_OAEP_4096_SHA1_AES_256 = 2;
  }

  // The state of the [ImportJob][google.cloud.kms.v1.ImportJob], indicating if it can be used.
  enum ImportJobState {
    // Not specified.
    IMPORT_JOB_STATE_UNSPECIFIED = 0;

    // The wrapping key for this job is still being generated. It may not be
    // used. Cloud KMS will automatically mark this job as
    // [ACTIVE][google.cloud.kms.v1.ImportJob.ImportJobState.ACTIVE] as soon as the wrapping key is generated.
    PENDING_GENERATION = 1;

    // This job may be used in
    // [CreateCryptoKey][google.cloud.kms.v1.KeyManagementService.CreateCryptoKey] and
    // [CreateCryptoKeyVersion][google.cloud.kms.v1.KeyManagementService.CreateCryptoKeyVersion]
    // requests.
    ACTIVE = 2;

    // This job can no longer be used and may not leave this state once entered.
    EXPIRED = 3;
  }

  // Output only. The resource name for this [ImportJob][google.cloud.kms.v1.ImportJob] in the format
  // `projects/*/locations/*/keyRings/*/importJobs/*`.
  string name = 1 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Required. Immutable. The wrapping method to be used for incoming key material.
  ImportMethod import_method = 2 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.field_behavior) = IMMUTABLE
  ];

  // Required. Immutable. The protection level of the [ImportJob][google.cloud.kms.v1.ImportJob]. This must match the
  // [protection_level][google.cloud.kms.v1.CryptoKeyVersionTemplate.protection_level] of the
  // [version_template][google.cloud.kms.v1.CryptoKey.version_template] on the [CryptoKey][google.cloud.kms.v1.CryptoKey] you
  // attempt to import into.
  ProtectionLevel protection_level = 9 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.field_behavior) = IMMUTABLE
  ];

  // Output only. The time at which this [ImportJob][google.cloud.kms.v1.ImportJob] was created.
  google.protobuf.Timestamp create_time = 3 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. The time this [ImportJob][google.cloud.kms.v1.ImportJob]'s key material was generated.
  google.protobuf.Timestamp generate_time = 4 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. The time at which this [ImportJob][google.cloud.kms.v1.ImportJob] is scheduled for
  // expiration and can no longer be used to import key material.
  google.protobuf.Timestamp expire_time = 5 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. The time this [ImportJob][google.cloud.kms.v1.ImportJob] expired. Only present if
  // [state][google.cloud.kms.v1.ImportJob.state] is [EXPIRED][google.cloud.kms.v1.ImportJob.ImportJobState.EXPIRED].
  google.protobuf.Timestamp expire_event_time = 10 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. The current state of the [ImportJob][google.cloud.kms.v1.ImportJob], indicating if it can
  // be used.
  ImportJobState state = 6 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. The public key with which to wrap key material prior to
  // import. Only returned if [state][google.cloud.kms.v1.ImportJob.state] is
  // [ACTIVE][google.cloud.kms.v1.ImportJob.ImportJobState.ACTIVE].
  WrappingPublicKey public_key = 7 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. Statement that was generated and signed by the key creator
  // (for example, an HSM) at key creation time. Use this statement to verify
  // attributes of the key as stored on the HSM, independently of Google.
  // Only present if the chosen [ImportMethod][google.cloud.kms.v1.ImportJob.ImportMethod] is one with a protection
  // level of [HSM][google.cloud.kms.v1.ProtectionLevel.HSM].
  KeyOperationAttestation attestation = 8 [(google.api.field_behavior) = OUTPUT_ONLY];
}

// [ProtectionLevel][google.cloud.kms.v1.ProtectionLevel] specifies how cryptographic operations are performed.
// For more information, see [Protection levels]
// (https://cloud.google.com/kms/docs/algorithms#protection_levels).
enum ProtectionLevel {
  // Not specified.
  PROTECTION_LEVEL_UNSPECIFIED = 0;

  // Crypto operations are performed in software.
  SOFTWARE = 1;

  // Crypto operations are performed in a Hardware Security Module.
  HSM = 2;

  // Crypto operations are performed by an external key manager.
  EXTERNAL = 3;
}

// ExternalProtectionLevelOptions stores a group of additional fields for
// configuring a [CryptoKeyVersion][google.cloud.kms.v1.CryptoKeyVersion] that are specific to the
// [EXTERNAL][google.cloud.kms.v1.ProtectionLevel.EXTERNAL] protection level.
message ExternalProtectionLevelOptions {
  // The URI for an external resource that this [CryptoKeyVersion][google.cloud.kms.v1.CryptoKeyVersion] represents.
  string external_key_uri = 1;
}